Discharge valve for cisterns



Sept- 21, 95 J. L. PEGLER DISCHARGE VALVE FOR CISTERNS Filed Aug. 8,1952 Patented Sept. 21,- 1954 DISCHARGE VALVE FOR CISTERNS Joseph LesliePeglerfBeecroft, near Sydney, New South Wales, Australia, assignor toLockair Pty. Limited, Sydney, New South Wales, Australia, a corporationof New South Wales Application August 8, 1952, Serial No. 303,306

Claims priority, application Australia July 28, 1952 Claims.

This invention relates to discharge valves for cisterns and moreespecially has reference to devices of that description known as Suckervalves.

Valves of that description at present in use embody a flexible suctioncup which is arranged on operation of a hand lever, to be forced downonto the valve proper and to lift the latter for a suiiicient length oftime to allow water contained in the cistern to flow freely down thedischarge pipe thereof underthe influence of gravity.

The known arrangements call for a system of links and/or levers, and assome of those components are relatively long the mechanism as a Wholedoes not always operate satisfactorily. Moreover in many of the knownarrangements the suction cup cannot easily be flattened suihciently tocreate that degree of vacuum necessary to lift effectively the valveproper, with the consequence that repeated attempts must be made todischarge the cistern, or such attempts are not persevered with. In thecase of flushing cisterns that neglect is, of course, objectionable.

The present invention seeks to overcome the recognized defects ofexisting Sucker valves, and at the same time aims at providingarrangements for their operation which will render such valves moreefficient and less costly than those now in use. p

The invention is characterized chiefly in that thebeforementionedsuction cup is arranged to be pushed into direct contactwith the upper surface of the reduced and pliant marginal portion of aflexible disc designed to bearagainst the seat of a discharge fittingwhich isintended to be affixed in the floor of a cistern.

In order however that the invention may be clearly understood andreadily carried into practical eflect reference is now made to theaccompanying drawings wherein:

Figure 1 shows a transverse vertical section of portion of an ordinaryflushing cistern with a dis charge valve embodying the presentimprovements in their preferred form; and

Figure 2 is an enlarged view at right angles to Figure 1, and taken onthe vertical plane 22 indicated in that figure.

Figure 3 is a sectional plan taken on the horizontal plane 3-3 of Figure2.

According to the invention as illustrated the improved discharge valveas a whole is installed in the floor 5 of an ordinary flushing cistern6. The head I of the valve proper is of a relatively heavy hard-settingcomposition of known type such as plaster, cement or the like, and saidhead I has applied or aflixed to its underiace a disc 8 of rubber orother appropriate flexible material. This disc 8 has a reduced pliantmarginal portion 9 which extends beyond the perimeter of the head I. I

A valve stem [0 with its head ll embedded in the head I is slidablevertically in a spider l2 which is moulded integrally in a dischargefitting i3. This discharge fitting I3 is preferably of one of the wellknown hard setting plastic materials and is secured in the floor 5 withthe aid of a back nut l4 and gasket [5. The upper edge of the dischargefitting 13 constitutes a seat It for the disc 8.

Above the head I of the valve proper there is an inflexible cup I! alsopreferably of one of the well known hard setting plastic materials. Infact this cup I! can conveniently be employed in the first instance asamould for the head I so that the one will be the complement of theother.

The cup has one or more bleed-holes H3 in its skirt and is aflixed tothe lower end of a vertical stem IS. The upper end portion of this stemI9 is connected to the outer end of a lever 20 which is pivoted to abracket 2!. This bracket 2| lies against the inner face of wall 22 ofthe cistern 6 and is held in position by a push-button fitting 23 ledinto said wall 22.

A push-button 24 loaded by a spring 25 is slidable in the mouth offitting 23, and a stem 26 at-' tached to or integral withthe button. 24has one end of a link 21 attached to its projecting end 28. The otherend 29 of link 21 is connected to the lever 20. V i

Any suitable form of inlet fitting may be mounted in the cistern 6 tosupply water automatically after each flushing. The fitting 39 shown inFigure l is of a known pedestal type having a valve encased in its head3! and arranged to be opened when the ball float 32 falls with areceding water level.

Assuming that the cistern 6 has been filled automatically to the levelindicated by the broken line 33 in Figure 1, flushing isinitiated bypressing in the push-button 24.

Movement of the push-button 24 is transmitted to the lever 20 throughlink 2'! and, being multiplied by the leverage, is used to force the cupI! downwards until its rim presses intimately all around, onto theflexible marginal portion 9 of the disc 8.

The push-button 24 can then be released and it will be returned to itsnormal position by spring 25. At the same time the spring 25 will raisethe lever 20 through the medium of link 2i and consequently the cup I!will suck up with it the valve proper.

Poised above the seat 16 the valve proper will be suspended for aninterval until sufiicient water has seeped through the bleed-hole orholes l8 to break the suction exerted on the valve proper by the cup [1.The interval is long enough to allow sufficient water torush downthrough the discharge fitting I3 and effect flushing below.

It will be appreciated that while the construction illustratedincorporates a spring in immediate association with the push-button 24 acompression spring could be arranged say below the lever 26 toelevatethe cup I! after it has been forced down by pressure on thepush-button 24, or some other obvious alternative could be adapted.

I claim:

1. A discharge valve for cisterns comprising in combination a dischargefitting provided with means whereby it can be secured in the floor of acistern, a valve proper having a head with a flexible disc below saidhead, said disc having a reduced and pliant marginal portion extendingbeyond the perimeter of said head, an inflexible cup suspended abovesaid head, and a push-button located in a wall of said cistern, saidpushbutton being connected to means whereby 'the rim of said cup can beforced against the reduced and pliant marginal portion of said disc tolift by suction the aforesaid valve proper.

2. A discharge valve for cisterns comprising in combination a dischargefitting with a valve seat and provided with means whereby it can besecured in the floor of a cistern, a valve proper having a compositehead and a vertical stem, a flexible disc below said head with a reducedand pliant marginal portion extending beyond the perimeter of said head,an inflexible cup complementary to said head and suspended above saidhead, and a push-button located in a wall of said cistern, saidpush-button being connected to means whereby the rim of said cup can beforced against the reduced and pliant marginal portion of said disc tolift by suction from said seat the aforesaid valve proper.

3. A discharge valve for cisterns comprising in combination a dischargefitting with a valve seat and provided with means whereby it' can besecured in the floor-of a cistern, a valve proper having a compositehead of hard-setting cementitious material, and having a stem risingvertically combination a discharge fitting with a valve seat cupcomplementary to said head and suspended above said head, and aspring-loaded push-button located in a wall of said cistern, saidpush-button being connected to means whereby the rim of said cup can beforced against the reduced and pliant marginal portion of said disc tolift by suction from said seat the aforesaid valve proper.

4. A discharge valve for cisterns comprising in and provided with meanswhereby it can be secured in the floor of a cistern, a valve properhaving a composite head of hard-setting cementitious material, andhaving a stem rising vertically therefrom, a lever pivoted to saidcistern and having its free end fastened to said stem, a flexible discbelow said head with a reduced and pliant marginal portion extendingbeyond the perimeter of said head, an inflexible cup complementary tosaid head and suspended above said head, and-a spring-loaded push-buttonlocated in a wall of said cistern, said push-button being connected to alink which in turn is connected to said lever so that said lever willforce the rim of said cup against the reduced and pliant marginalportion of said disc and raise said valve proper from said seat whensaid push-button is pressed.

5. A discharge valve for cisterns comprising in combination a dischargefitting of hard setting plastic material and provided with means wherebyit can be secured in the floor of a cistern, a valve proper having acomposite head of hard setting cementitious material, a flexible discbelow said head and having a reduced and pliant marginal portionextending beyond the perimeter of said head, a cup of hard settingplastic material complementary to said head and suspended above saidhead, a spring loaded push-button located in therefrom, a flexible discbelow said head with a 1 reduced and pliant marginal portion extendingbeyond the perimeter of said head, an inflexible a wall in said cistern,and a link connected to a lever whereby movement of said push-button istransmitted to said valve proper to raise it by suction and thereby opensaid discharge fitting.

References Cited in the file of this patent UNITED STATES PATENTS NumberName 1 Date 211,260 Ross Jan. 7, 1879 943,131 Zwermann Dec. 14, 19891,525,475 Tutt Feb. 10, 1925 1,616,560 Vanderlip Feb. 8, 1927 FOREIGNPATENTS Number Country Date 1,673/31 Australia Nov. 5, 1931 2,497 GreatBritain June 16, 1376

